feat: add chunk PDF serving endpoint and frontend clickable source links (1.5.6)
- Add page_number and chunk_file_path to SourceMetadata model and query router
- Add GET /chunks/{file_path}/pdf endpoint with path traversal protection
- Add View PDF links in ResponsePanel source cards and ChunkList component
- Update TypeScript types and API helper for chunk PDF URLs
- Add backend tests (5) and frontend ChunkList tests (7)
- Update enhancement plan: all 3 features complete
This commit is contained in:
Woody
parent
64043b75a7
commit
d49756f374
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@ -2,7 +2,7 @@
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**Source**: User request (2026-04-23)
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**Scope**: Frontend navigation + RAG Database management page + page-aware chunking with chunk PDFs
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**Status**: 🔄 In Progress — Features 1-2 ✅ Complete, Feature 3 pending
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**Status**: ✅ Complete — All 3 features implemented (1.5.1–1.5.6)
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---
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@ -35,8 +35,8 @@ Enhance the existing Phase 1 application with three features:
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- ~~No routing or multi-page support~~ ✅ Done in Feature 1
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- ~~No way to view what's stored in ChromaDB~~ ✅ Backend CRUD done (sub-phase 1.5.2)
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- ~~No way to delete documents or chunks~~ ✅ Backend CRUD done (sub-phase 1.5.2)
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- No page-level awareness in chunking (all pages flattened before token splitting)
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- No persistent chunk files (chunks only exist as ChromaDB document text)
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- ~~No page-level awareness in chunking (all pages flattened before token splitting)~~ ✅ Done in 1.5.4
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- ~~No persistent chunk files (chunks only exist as ChromaDB document text)~~ ✅ Done in 1.5.5
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- No clickable links in RAG responses to view source chunks
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- ~~Upload only via IngestPanel on the main query page~~ (IngestPanel stays on LTT, upload also coming to RAG DB page)
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@ -211,7 +211,7 @@ class DeleteResponse(BaseModel):
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- [x] User can delete individual chunks (with confirmation)
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- [x] User can upload documents from this page
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- [x] Stats displayed: total documents, total chunks
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- [ ] Uploading a file with existing filename triggers automatic replacement (old data deleted first)
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- [x] Uploading a file with existing filename triggers automatic replacement (old data deleted first)
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---
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@ -493,19 +493,19 @@ legco_reranker/
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### 3.5 Acceptance Criteria
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- [ ] PDF uploads produce page-aware chunks: 1 chunk per page with 200-token overlap from adjacent pages
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- [ ] Each page is saved as a separate PDF (original page, not generated text) in `document_chunk/`
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- [ ] Chunk PDF filename follows convention: `{filename}_page_{n}.pdf`
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- [ ] Page numbers are sequential index (1, 2, 3...), not PDF internal labels
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- [ ] Oversized pages are kept as single chunks (never split)
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- [ ] `GET /api/v1/chunks/{file_path}/pdf` serves the original chunk PDF
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- [ ] RAG response sources include `page_number` and `chunk_file_path`
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- [ ] Frontend source cards show page number and clickable link
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- [ ] Clicking source link opens/downloads the original chunk PDF
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- [ ] DOCX uploads work without page numbers (graceful degradation, no chunk PDFs)
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- [ ] Uploading a file with same filename replaces existing document (old chunks + PDFs deleted, new document_id)
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- [ ] `document_chunk/` is `.gitignore`d
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- [ ] Deleting a document also removes its chunk PDFs from `document_chunk/`
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- [x] PDF uploads produce page-aware chunks: 1 chunk per page with 200-token overlap from adjacent pages
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- [x] Each page is saved as a separate PDF (original page, not generated text) in `document_chunk/`
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- [x] Chunk PDF filename follows convention: `{filename}_page_{n}.pdf`
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- [x] Page numbers are sequential index (1, 2, 3...), not PDF internal labels
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- [x] Oversized pages are kept as single chunks (never split)
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- [x] `GET /api/v1/chunks/{file_path}/pdf` serves the original chunk PDF
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- [x] RAG response sources include `page_number` and `chunk_file_path`
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- [x] Frontend source cards show page number and clickable link
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- [x] Clicking source link opens/downloads the original chunk PDF
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- [x] DOCX uploads work without page numbers (graceful degradation, no chunk PDFs)
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- [x] Uploading a file with same filename replaces existing document (old chunks + PDFs deleted, new document_id)
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- [x] `document_chunk/` is `.gitignore`d
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- [x] Deleting a document also removes its chunk PDFs from `document_chunk/`
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---
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@ -534,7 +534,7 @@ Feature 3 (Page-Aware Chunking) ← Modifies ingestion pipeline
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| 1.5.3 | 2 | Frontend RAG Database page | None | RAGDatabasePage, DocumentList, ChunkList, DocumentUpload, API hooks | ✅ Complete |
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| 1.5.4 | 3 | Page-aware parsing & chunking | pdf_parser, chunking, metadata enhancements | None | ✅ Complete |
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| 1.5.5 | 3 | Chunk PDF generation & storage | pdf_extractor, config, ingest pipeline refactor | None | ✅ Complete |
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| 1.5.6 | 3 | Chunk file serving + frontend links | documents router endpoint | ResponsePanel clickable links, ChunkList updates | 📋 Pending |
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| 1.5.6 | 3 | Chunk file serving + frontend links | documents router endpoint | ResponsePanel clickable links, ChunkList updates | ✅ Complete |
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### Parallelization Opportunities
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@ -619,7 +619,7 @@ None — all resolved.
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| `test_phase1_pdf_parser_pages.py` | parse_pdf_by_page() — multi-page PDFs, single-page, empty |
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| `test_phase1_page_aware_chunking.py` | chunk_with_pages() — cross-page chunks, single-page chunks |
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| `test_phase1_pdf_extractor.py` | extract_page_as_pdf() — valid page, out-of-range, corrupt PDF |
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| `test_phase1_chunk_serving.py` | GET /chunks/{path}/pdf — valid file, missing file, path traversal |
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| `test_phase1_chunk_serving.py` | ✅ GET /chunks/{path}/pdf — valid file, missing file, path traversal, filenames with spaces (5 tests, all pass) |
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### Frontend Tests (New Files)
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@ -628,7 +628,7 @@ None — all resolved.
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| `NavBar.test.tsx` | Navigation links, active state |
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| `RAGDatabasePage.test.tsx` | Document list, delete, upload |
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| `DocumentList.test.tsx` | Document cards, expand/collapse |
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| `ChunkList.test.tsx` | Chunk table, page numbers, PDF links |
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| `ChunkList.test.tsx` | ✅ Chunk table, page numbers, PDF links (7 tests, all pass) |
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### Acceptance Tests
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@ -1,3 +1,5 @@
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from typing import Optional
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from pydantic import BaseModel
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@ -6,3 +8,5 @@ class SourceMetadata(BaseModel):
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upload_date: str
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content_summary: str
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chunk_index: int
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page_number: Optional[int] = None
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chunk_file_path: Optional[str] = None
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@ -3,6 +3,7 @@ import logging
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import os
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from fastapi import APIRouter, HTTPException
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from fastapi.responses import FileResponse
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from app.models.documents import (
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DocumentInfo,
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@ -126,3 +127,30 @@ async def delete_chunk(chunk_id: str):
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deleted=True,
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message=f"Deleted chunk {chunk_id}",
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)
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@router.get("/chunks/{file_path:path}/pdf")
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async def get_chunk_pdf(file_path: str):
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"""Serve a chunk PDF file from document_chunk/ directory."""
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from app.core.config import get_settings
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# Path traversal protection
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if ".." in file_path:
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raise HTTPException(status_code=400, detail="Invalid file path")
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settings = get_settings()
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base_dir = os.path.realpath(settings.document_chunk_path)
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full_path = os.path.realpath(os.path.join(base_dir, file_path))
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# Ensure resolved path is within base directory
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if not full_path.startswith(base_dir + os.sep) and full_path != base_dir:
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raise HTTPException(status_code=400, detail="Invalid file path")
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if not os.path.isfile(full_path):
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raise HTTPException(status_code=404, detail=f"Chunk file not found: {file_path}")
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return FileResponse(
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full_path,
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media_type="application/pdf",
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filename=os.path.basename(full_path),
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)
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@ -59,6 +59,8 @@ async def query(request: QueryRequest):
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upload_date=meta.get("upload_date", ""),
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content_summary=meta.get("content_summary", ""),
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chunk_index=meta.get("chunk_index", 0),
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page_number=meta.get("page_number"),
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chunk_file_path=meta.get("chunk_file_path"),
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)
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for meta in chunk_metadata
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]
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@ -0,0 +1,73 @@
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"""Tests for chunk PDF file serving endpoint.
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Coverage:
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- GET /api/v1/chunks/{file_path}/pdf — success, 404, path traversal 400
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"""
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import os
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import tempfile
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import unittest
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from unittest.mock import patch
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from fastapi.testclient import TestClient
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from app.main import app
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class TestChunkServing(unittest.TestCase):
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"""Test GET /api/v1/chunks/{file_path}/pdf endpoint."""
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def setUp(self):
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self.client = TestClient(app)
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def test_get_chunk_pdf_success(self):
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"""Should serve chunk PDF file with 200 and application/pdf."""
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with tempfile.TemporaryDirectory() as tmp_dir:
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test_file = os.path.join(tmp_dir, "test_page_1.pdf")
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with open(test_file, "wb") as f:
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f.write(b"%PDF-1.4 fake content")
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with patch("app.core.config.get_settings") as mock_settings:
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mock_settings.return_value.document_chunk_path = tmp_dir
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response = self.client.get("/api/v1/chunks/test_page_1.pdf/pdf")
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self.assertEqual(response.status_code, 200)
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self.assertIn("application/pdf", response.headers["content-type"])
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def test_get_chunk_pdf_not_found(self):
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"""Should return 404 for non-existent chunk file."""
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with patch("app.core.config.get_settings") as mock_settings:
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mock_settings.return_value.document_chunk_path = "/tmp/nonexistent_chunk_dir"
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response = self.client.get("/api/v1/chunks/nonexistent.pdf/pdf")
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self.assertEqual(response.status_code, 404)
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def test_get_chunk_pdf_path_traversal_double_dot(self):
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"""Should reject path traversal with .. (404 due to Starlette normalization)."""
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with patch("app.core.config.get_settings") as mock_settings:
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mock_settings.return_value.document_chunk_path = "/tmp/fake_chunk_dir"
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response = self.client.get("/api/v1/chunks/../etc/passwd/pdf")
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self.assertIn(response.status_code, [400, 404])
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def test_get_chunk_pdf_path_traversal_symlink_escape(self):
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"""Should reject resolved path escaping base directory (404 from normalization)."""
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with tempfile.TemporaryDirectory() as tmp_dir:
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with patch("app.core.config.get_settings") as mock_settings:
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mock_settings.return_value.document_chunk_path = tmp_dir
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response = self.client.get("/api/v1/chunks/../../etc/passwd/pdf")
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self.assertIn(response.status_code, [400, 404])
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def test_get_chunk_pdf_with_spaces_in_filename(self):
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"""Should serve files with spaces in the filename."""
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with tempfile.TemporaryDirectory() as tmp_dir:
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test_file = os.path.join(tmp_dir, "NEC4 ACC_page_3.pdf")
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with open(test_file, "wb") as f:
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f.write(b"%PDF-1.4 fake content")
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with patch("app.core.config.get_settings") as mock_settings:
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mock_settings.return_value.document_chunk_path = tmp_dir
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response = self.client.get("/api/v1/chunks/NEC4 ACC_page_3.pdf/pdf")
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self.assertEqual(response.status_code, 200)
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self.assertIn("application/pdf", response.headers["content-type"])
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@ -1,6 +1,7 @@
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import React from 'react'
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import { Trash2 } from 'lucide-react'
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import type { ChunkInfo } from '../types'
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import { getChunkPdfUrl } from '../lib/api'
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interface ChunkListProps {
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chunks: ChunkInfo[]
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@ -64,6 +65,17 @@ export const ChunkList: React.FC<ChunkListProps> = ({
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? `${chunk.content_summary.slice(0, 100)}...`
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: chunk.content_summary}
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</div>
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{chunk.chunk_file_path && (
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<a
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href={getChunkPdfUrl(chunk.chunk_file_path)}
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target="_blank"
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rel="noopener noreferrer"
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className="inline-flex items-center mt-1 text-xs text-blue-600 hover:text-blue-800 hover:underline"
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data-testid="view-chunk-pdf-link"
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>
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View PDF
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</a>
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)}
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</div>
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<button
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data-testid="delete-chunk-btn"
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@ -2,6 +2,7 @@ import React, { useState } from 'react'
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import { MessageSquare, AlertCircle, Copy, ChevronDown, ChevronRight } from 'lucide-react'
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import ReactMarkdown from 'react-markdown'
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import type { SourceMetadata } from '../types'
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import { getChunkPdfUrl } from '../lib/api'
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interface ResponsePanelProps {
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answer: string | null
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@ -133,10 +134,30 @@ export const ResponsePanel: React.FC<ResponsePanelProps> = ({
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key={index}
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className="border border-gray-200 rounded p-3 bg-gray-50"
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>
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<div className="font-medium text-sm">{source.filename}</div>
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<div className="flex items-center justify-between">
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<div className="font-medium text-sm">{source.filename}</div>
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{source.page_number !== null && (
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<span className="text-xs text-blue-600 font-medium">
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Page {source.page_number}
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</span>
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)}
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</div>
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<div className="text-sm text-gray-500">{source.upload_date}</div>
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<div className="text-sm text-gray-600 mt-1">{source.content_summary}</div>
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<div className="text-xs text-gray-400 mt-1">Chunk {source.chunk_index}</div>
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<div className="flex items-center justify-between mt-1">
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<div className="text-xs text-gray-400">Chunk {source.chunk_index}</div>
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{source.chunk_file_path && (
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<a
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href={getChunkPdfUrl(source.chunk_file_path)}
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target="_blank"
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rel="noopener noreferrer"
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className="text-xs text-blue-600 hover:text-blue-800 hover:underline"
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data-testid="view-chunk-pdf-link"
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>
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View PDF
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</a>
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)}
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</div>
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</div>
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))}
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</div>
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@ -38,3 +38,8 @@ export const deleteChunk = async (chunkId: string): Promise<DeleteResponse> => {
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const resp = await apiClient.delete<DeleteResponse>(`/chunks/${chunkId}`)
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return resp.data
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}
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export const getChunkPdfUrl = (filePath: string): string => {
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const baseUrl: string = import.meta.env.VITE_API_BASE_URL ?? 'http://localhost:8000/api/v1'
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return `${baseUrl}/chunks/${filePath}/pdf`
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}
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@ -0,0 +1,136 @@
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import { describe, it, expect, vi } from 'vitest'
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import { render, screen, fireEvent } from '@testing-library/react'
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import { ChunkList } from '../../components/ChunkList'
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import type { ChunkInfo } from '../../types'
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vi.mock('../../lib/api', () => ({
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getChunkPdfUrl: (path: string) => `http://localhost:8000/api/v1/chunks/${path}/pdf`,
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}))
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const mockChunks: ChunkInfo[] = [
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{
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chunk_id: 'doc1_0',
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chunk_index: 0,
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content_summary: 'Summary of chunk 0 content...',
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page_number: 1,
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chunk_file_path: 'test_page_1.pdf',
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},
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{
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chunk_id: 'doc1_1',
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chunk_index: 1,
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content_summary: 'Summary of chunk 1 content that is quite long and should be truncated when displayed in the component',
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page_number: 2,
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chunk_file_path: 'test_page_2.pdf',
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},
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{
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chunk_id: 'doc1_2',
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chunk_index: 2,
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content_summary: 'A DOCX chunk without page info',
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page_number: null,
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chunk_file_path: null,
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},
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]
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describe('ChunkList', () => {
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it('renders chunk rows with chunk index and page number', () => {
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render(
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<ChunkList
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chunks={mockChunks}
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isLoading={false}
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onDeleteChunk={vi.fn()}
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isDeleting={false}
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/>
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)
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expect(screen.getByText(/Chunk 0/)).toBeInTheDocument()
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expect(screen.getByText(/Chunk 1/)).toBeInTheDocument()
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expect(screen.getByText(/Chunk 2/)).toBeInTheDocument()
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expect(screen.getByText(/Page: 1/)).toBeInTheDocument()
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expect(screen.getByText(/Page: 2/)).toBeInTheDocument()
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expect(screen.getByText(/Page: N\/A/)).toBeInTheDocument()
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})
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it('renders View PDF links for chunks with chunk_file_path', () => {
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render(
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<ChunkList
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chunks={mockChunks}
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isLoading={false}
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onDeleteChunk={vi.fn()}
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isDeleting={false}
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/>
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)
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const links = screen.getAllByTestId('view-chunk-pdf-link')
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expect(links).toHaveLength(2)
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expect(links[0]).toHaveAttribute('href', 'http://localhost:8000/api/v1/chunks/test_page_1.pdf/pdf')
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expect(links[0]).toHaveAttribute('target', '_blank')
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})
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it('does not render View PDF link for chunks without chunk_file_path', () => {
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const docxChunk = [mockChunks[2]]
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render(
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<ChunkList
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chunks={docxChunk}
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isLoading={false}
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onDeleteChunk={vi.fn()}
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isDeleting={false}
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/>
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)
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expect(screen.queryByTestId('view-chunk-pdf-link')).not.toBeInTheDocument()
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})
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it('calls onDeleteChunk when delete button is clicked', () => {
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const onDelete = vi.fn()
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render(
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<ChunkList
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chunks={[mockChunks[0]]}
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isLoading={false}
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onDeleteChunk={onDelete}
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isDeleting={false}
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||||
/>
|
||||
)
|
||||
|
||||
fireEvent.click(screen.getByTestId('delete-chunk-btn'))
|
||||
expect(onDelete).toHaveBeenCalledWith('doc1_0')
|
||||
})
|
||||
|
||||
it('shows loading skeletons when isLoading is true', () => {
|
||||
render(
|
||||
<ChunkList
|
||||
chunks={[]}
|
||||
isLoading={true}
|
||||
onDeleteChunk={vi.fn()}
|
||||
isDeleting={false}
|
||||
/>
|
||||
)
|
||||
|
||||
expect(screen.getAllByTestId('skeleton-line').length).toBeGreaterThan(0)
|
||||
})
|
||||
|
||||
it('shows empty message when no chunks', () => {
|
||||
render(
|
||||
<ChunkList
|
||||
chunks={[]}
|
||||
isLoading={false}
|
||||
onDeleteChunk={vi.fn()}
|
||||
isDeleting={false}
|
||||
/>
|
||||
)
|
||||
|
||||
expect(screen.getByText('No chunks found')).toBeInTheDocument()
|
||||
})
|
||||
|
||||
it('disables delete button when isDeleting is true', () => {
|
||||
render(
|
||||
<ChunkList
|
||||
chunks={[mockChunks[0]]}
|
||||
isLoading={false}
|
||||
onDeleteChunk={vi.fn()}
|
||||
isDeleting={true}
|
||||
/>
|
||||
)
|
||||
|
||||
expect(screen.getByTestId('delete-chunk-btn')).toBeDisabled()
|
||||
})
|
||||
})
|
||||
|
|
@ -10,12 +10,16 @@ describe('ResponsePanel', () => {
|
|||
upload_date: '2024-01-15',
|
||||
content_summary: 'Introduction to RAG systems',
|
||||
chunk_index: 0,
|
||||
page_number: 1,
|
||||
chunk_file_path: 'test_chunk_1.pdf',
|
||||
},
|
||||
{
|
||||
filename: 'document2.txt',
|
||||
upload_date: '2024-01-16',
|
||||
content_summary: 'Advanced retrieval techniques',
|
||||
chunk_index: 1,
|
||||
page_number: null,
|
||||
chunk_file_path: null,
|
||||
},
|
||||
]
|
||||
|
||||
|
|
|
|||
|
|
@ -23,6 +23,8 @@ const mockQueryResponse: QueryResponse = {
|
|||
upload_date: '2024-01-15',
|
||||
content_summary: 'Meeting minutes',
|
||||
chunk_index: 0,
|
||||
page_number: 1,
|
||||
chunk_file_path: 'test_chunk.pdf',
|
||||
},
|
||||
],
|
||||
}
|
||||
|
|
|
|||
|
|
@ -3,6 +3,8 @@ export interface SourceMetadata {
|
|||
upload_date: string
|
||||
content_summary: string
|
||||
chunk_index: number
|
||||
page_number: number | null
|
||||
chunk_file_path: string | null
|
||||
}
|
||||
|
||||
export interface QueryRequest {
|
||||
|
|
|
|||
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Reference in New Issue